Carpenter said:Legend99
A small postscript, don't ignore air getting into your system it's bad for the steel parts of your heating circuit (boiler, rads etc) and corrosion can get a hold. Venting of rads on a good system should only be necessary about once a year, I think
Carpenter said:Legend99
If there's air getting into your system you have a leak(s) my friend! Try this, run your system for 15/ 20mins to get the circulating water up to operating temperature, turn off and allow to cool a little. Go up into attic and check expansion tank (smaller storage tank). Lift cover and see if the ball cock is filling at all. On a leaktight, well designed system the ballcock should rarely operate at all except to make up a drop in levels caused by evaporation from the tank. When the system cools down a weeping joint will allow air to enter. Potential problem areas are bad joints on the bleeding vents. Again you might see water dribbling/ weeping from a vent that doesn't seal properly, try removing it a wrap a strand of PTFE around it before replacing it. Other notorious problem spots are the actual rad valves. Check all for leaks and remember a leaking valve is probably leaking around the gland nut (where the stem is). This can be tightened or else remove and wrap some PTFE around stem before refitting. If all above fails a pressure test on the system will help to diagnose any fault.
legend99 said:I have checked all the rads....none are producing water visibly. Either at the valves or the bleed joints. So I am getting seriously worried about a leak in the piping system...but I have been keeping a very close eye on all the plaster and there is no evidence of any wet patches etc so I am really lost.
I think he left container of some anti corrosive stuff behind so obviously never added it to the system.Carpenter said:legend99
Ask your builder to give you a gallon of Fernox while he's at it, at his expense if you can! It's about €35 in anycase.........
legend99 said:I think he left container of some anti corrosive stuff behind so obviously never added it to the system.
Yea, i can get the system up and running and check the expansion tank. At least if I see this filling I'll know for sure there is a leak. I'll check in detail the bleed joints and pipe valves. is it possible that one of them might be letting air leak in but no water be coming out...in that case its impossible I take it to find the issue?
maryrose said:I know this is not a seasonal topic, please bear with me , I know sweet sugarall about central heating, and I want to solve this problem before the winter returns.
We have oilfired central heating, and last Winter three rads., upstairs were replaced, apparently the exosting ones were corroded. The burner/boiler was also replaced. It had started giving problems , not firing up , you could never rely on it to work, I was convinced it chose the worst days of the year to go on the blink.
All of the above were approx in the house twenty five years.
Now , the problem is, those new rads., are not heating up sufficiently, they are tepid to cold, despite bleeding, balancing, and various procedures that plumbers use to coax rads., into performing.
I have been told that an airlock in the system , is the problem. I have also told that the heat is going to the immersion.
Have I got that right?
My main problem is that I dont know what questions to ask, is there anything I can do before Icall out a plumber again.
The guy who installed the rads., promised to return and "balance the rads" and never came back.
Two plumbers later, and we still have the same ole problem.
I dont want to turn this into a rant against plumbers, I just need help to understand whats gone wrong, so that I can at least see what the difficulty is .
thanks in advance to anyone who can offer a suggestion or give me an idea how best to solve this problem
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